Here are guidelines for coming up with an appropriate, manageable topic:
Ask your instructor for input in the early stages. What topics does s/he recommend?
Make sure the topic fulfills the goals of the assignment. Check out the rubric or consult your instructor for more info.
Choose a topic that is the right "size." You only have so many pages/minutes to cover your topic. Do your best to pick something that is narrow enough to include all pertinent details, and big enough that you don't find yourself repeating information or coming up short.
Our advice? Choose a topic you may be exploring in other courses. Connect your research with your other courses, or even your major/subject area.
National Criminal Justice Reference Service: Topics A to Z
Forensics / Digital Forensics
National Institute of Justice: Forensics
Digital Forensics Magazine: News
Psychology / Sociology / Social Work
Psychology Today: Topic Streams
American Psychological Association: Topics
Everyday Sociology Blog
National Association of Social Workers
Education
PBS Newshour: Education
United Stated Department of Education Blog
History
History Channel: Topics
Health Professions
MedLinePlus: Health Topics
National Institutes of Health: Health Topics
Centers for Disease Control: A to Z Index
Sport Management / Athletic Training
North American Society for Sport Management
National Athletic Trainers' Association: Informational Materials
Business / Economics
Bloomberg Businessweek
New York Times: Business and financial news
The Economist: Topics A to Z
Science
Scientific American: Topics
New York Times: Science